Davelim,
To be honest with you, i too drive a Gen2, at the moment, yup the only things that you can play around it for now is intake and exhaust setups. But do get your exhaust setup done properly otherwise like what others say it works the other way around. The engine actually gives quite a decent performance provided you highrev it all the time, enough said about its low end ability. However getting a good intake setup can overcome this slightly. The problem with going to speedworks is that its a bit on the high side. Some of the exhaust system's that offer by normal exhaust shops are quite decent, so you might be able to get recommendations from them. Anyways anything more that this, i:e cams and other stuff, its better to just wait and see first, as there still people experimentating on items like dastek's unichip piggyback system and OBIT piggyback system, however i know some have already use OBIT but there's still not enough numbers to justify its reliability.